Hoop for silos and like tanks.



A. RASMUSSEN.

HOOP FOR SILOS AND LIKE TANKS. APPLICATION FILED MAR. 13, 1914,

1 1 4 1 ,4 1 3 n Patented June 1, 1915.

Mlnssee: In UefiRTr IHE NORRIS PETERS c0. PHOTOVLITHQ. WASHING/ION, D. C.

entree s'rnrns PATENT entree.

ANDREW RASMIUSSEN, OF RAOINE JUNGTION,'WISCONSIN, ASSIGNOR TO PEERLESS SILO SUPPLY 00., OF RACINE, WISCONSIN, A CORPORATION OF WISCONSIN.

HOOP FOR SILOS AND LIKE TANKS.

Specification of Letters Patent.

Patented June 1, 1915.

Application filed. March 13, 1914. Serial No. 824,365.

.exact description thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to improvementsin hoops and hoop fasteners for silos and like tanks or tubs, and more especially to such tanks or receptacles of which the walls are made of matched staves. 7

Among the objects of the invention is to provide a hoop or encircling member for such tanks and the like of a construction which may be readily applied to and formed on the tank without the necessity of preliminarily forming'same.

A further object of the invention is to pro vide a hoop or encircling member of this character which is convenient to handle and ship.

Other objects ofthe invention are to mprove and simplify hoops and encircling members for silos and like tanks, and the invention consists in the matters hereinafter set forth and more particularly pointed out in the appended claims. u

In the drawings :.Figure 1 1s a horizontal section of a tank provided with a hoop and hoop fasteners embodying my invention.

Fig. 2 is a fragmentary side elevation thereof. Fig.3 is a sectional detail on the line 33 of Fig. 2. Fig. 41- is a' side elevation of one of the hoop sections. Fig. 5 is an end view of one of the end fittings constituting part of the hoop section or member,

As shown in the drawings, 10 designates the wall of the silo tank or inclosure, made up of matched staves in the usual or any preferred manner, and 11 designates, as a whole, the hoops or enclrcling members which surround 013110111318 the tank.

12, 12 designate hoop tighteners or fasteners 12. r

In accordance with one feature of my invention the hoop, whether it consists of a single length or section or of a number of sectlons, consists of flexible twin members 13, 13 and end fittmgs 1A, 11 to WlllCh the ends of said twin members 13 are connected.

The said twin hoop members maybe applied in any suitable manner to the end fittings. As herein shown each of the twin members extend through longitudinal openings 15 in the end fittings and are turned back to form hooks 16 which are seated in other openings 17 in the end fittings. The said end fittings are further provided with openings 18 through which the hoop tighteners 12 extend and by which the ends of the said'hoop or the ends of the adjoining sections are fastened together. As herein shown, said hoop fasteners consist of headed bolts screw-threaded to receive nuts 19 by which the end fittings are drawn together to t1ghten the hoop sections about the tank walls. Preferably the said openings in the end fittings through which the hoop tighteners extend are elongated transversely of said fittings and are also larger in all dimensions than the exterior diameter of the bolts so as to permit said fittings and bolts to adapt themselves to each other and to the wall of the tank. In order that the said end fittings may be made as light as possible, consistent with ample strength, the said transverse openings 18 may be formed partially in the ribs 20 on the exterior side faces of the end fittings, as shown in Fig. 5.

As shown in Fig. 1, each hoop is made of three sections. This arrangement, however, may be varied to accord with the diameter of the tank or other conditions. I have not herein shown the detail of the hoop connectors at the door of the silo, but such detail may be arranged in any suitable or preferred manner as, for instance, in the manner shown in my pending application for U. S. Letters Patent, Serial No. 806,161, filed on December 12th, 1913. Moreover, springs may be interposed in the said hoop in the manner shown in said prior applicatien or otherwise, for the purpose set forth in said application.

An important advantage of the construction described is that the twin members 13 constituting the hoop or hoop sections, and which are vertically spaced on the tank wall, may be made of a diameter which permits them to be sufliciently flexible to allow the hoop to be readily applied to and formed on the tank wall, and to lie closely upon or cling to the said wall. Heretofore, it has been a common practice to make hoops of a single round shape, and in practice, in order to secure the required tensile'strength, it is necessary to makesuch shapes of a diameter not readily flexible. It has, therefore, been the common practice to form or curve said hoops or hoop sections by a suitable form-- ing machine so asto adapt the same to tanks of a given or substantially known diameter in order that said hoops may be applied with approximate accuracy :to the tank. This practice results in the necessary expensc of forming the hoops and also results in producing a curved hoop section to be transported from the factory to the field of strength than the twin members 13 of the hoop and, therefore, most likely to part vided by the manufacturer.

under tensile strain. However, such tighteners may consist of ordinary machine bolts and are therefore, very readily replaceable as compared to the replacement'or repair 7 of rods or bands heretofore employed. The

breakage of the threaded ends of the hoops necessitates that they be taken to a blacksmith shop for straightening, welding and recurving, obviously at an expenditure of considerable time and labor. 7

Another advantage of the construction described is that all parts of the hoops may be readily made or formed in an ordinary well equipped blacksmiths shop, with the exception' of the end fittings which constitute the only parts that are necessary to be pro- Thus, in locations where the freight rate is a disadvantage against the shipment of the entire hoop structure, the hoops may be principally furnished by the local blacksmith or machine A shop upon receiving the end fittings to which the hoop members 13 and the tighteners 12 are adaptable. A further advantage of the construction described is that a central pull is exerted on the twin hoop members 13 by reason-of the fact that the tightening bolts 12 are disposed-centrally of the said hoop members. Thusthe pull on the hoop members is equalized.

I claim as my invention V 1. A hoop for a silo and like tank comprising a plurality of sections arranged end to end and constituting the principal length of the hoop, each section consisting of septhe opposite sides ofwh-ich the ends of the hoop members-are, attached, and hoop tighteners extending between and attached-to arate twin hoop members andend fittings to adjacent, end sections between the ends of the twin members to draw the hoops together and to equalize the tensioning of the hoop members about the tank.

V 2. A hoop for a silo and other tanks comprising separate twin hoop members, constituting the principal length of the hoop, fittings extending across the endsof'said members and provided at opposite sides with openings to receive the ends of the hoop members, whereby they are attached to said fittings, said fittings being provided centrally between said openings with other openings to receive a tension membeig'and a tension member extending throughthe latter openings to draw the hoop ends together and to equalize the tensioning of the hoop members about the tank.

3. A hoop for a silo and other tanks com-- posed of twin'hoop members, fittings at'the ends thereof, said fittings being provided with openings through whichsaid members extend and provided with other openings,

In testimony, that I claim the foregoing as my invention 1 signature in the presence of two witnesses, this 6th day of March, A. D. 191%.

7 ANDREW Rasmussen.

WVitnesses:

C. OLSON, i H. N. B ACON.

Copies. of this'patent may be obtained for five cents each, by addressing the Commissioner tit-Patents, Washington, DLC. 

